Life: The Science of Biology

Life: The Science of Biology

David E. Sadava, H. Craig Heller, Gordon H. Orians, William K. Purves

Language: English

Pages: 1121

ISBN: 0716776715

Format: PDF / Kindle (mobi) / ePub

Co-published by Sinauer Associates, Inc., and W. H. Freeman and Company.  Visit the Life, Eighth Edition preview site.
LIFE HAS EVOLVED. . . from its original publication to this dramatically revitalized Eighth Edition. LIFE has always shown students how biology works, offering an engaging and coherent presentation of the fundamentals of biology by describing the landmark experiments that revealed them. This edition builds on those strengths and introduces several innovations.
As with previous editions, the Eighth Edition will also be available in three paperback volumes:
  • Volume I: The Cell and Heredity, Chapters 1-20
  • Volume II: Evolution, Diversity and Ecology, Chapters 1, 21-33, 52-57
  • Volume III: Plants and Animals, Chapters 1, 34-51

Illegal Beings: Human Clones and the Law

Cannabis: The Genus Cannabis

Life Everlasting: The Animal Way of Death

Peacemaking among Primates

Neurobiology of Interval Timing (Advances in Experimental Medicine and Biology, Volume 829)




















“decide” whether to act as an oxygenase or a carboxylase? First, rubisco has 10 times more affinity for CO2 than O2, and so favors CO2 fixation. Another consideration is the relative concentrations of CO2 and O2 in the leaf. If O2 is relatively abundant, rubisco acts as an oxygenase, and photorespiration ensues. If CO2 predominates, rubisco fixes it, and the Calvin–Benson cycle occurs. Temperature is also a factor: photorespiration is more likely at high temperatures. Spongy mesophyll cell Lower

while cellulose is an excellent structural material that can withstand harsh environmental conditions without changing. Chemically modified carbohydrates contain other groups Some carbohydrates are chemically modified by the addition of functional groups, such as phosphate and amino groups LIFE AND CHEMISTRY: LARGE MOLECULES (a) Molecular structure Starch and glycogen CH2OH O H OH H Cellulose H H O CH2OH O H OH H H OH O H H 49 H OH OH H H O CH2OH H H O CH2OH O H OH H H OH O H

prokaryotic cells and in eukaryotic plant cells? a. Chloroplasts b. Cell walls c. Nucleus d. Mitochondria e. Microtubules 2. The major factor limiting cell size is the a. concentration of water in the cytoplasm. b. need for energy. c. presence of membranous organelles. d. ratio of surface area to volume. e. composition of the plasma membrane. 3. Which statement about mitochondria is not true? a. Their inner membrane folds to form cristae. b. They are usually 1 µm or smaller in diameter. c. They

substance entering the body from the lumen must pass through the epithelial cells. They restrict the migration of membrane proteins and phospholipids from one region of the cell to another. Thus, the proteins and phospholipids in the apical (tip) region of the cell facing the lumen can be different from those in the basolateral regions facing the sides and bottom of the cell (basolateral: basal = bottom; lateral = side). By forcing materials to enter certain cells, and by allowing different ends

potassium pump, drive transport of glucose against its concentration gradient. Primary active transport The sodium–potassium pump moves sodium ions, using the energy of ATP hydrolysis to establish a concentration gradient of Na+. Outside of cell 101 5.14 Secondary Active Transport The Na+ concentration gradient established by primary active transport (right) powers the secondary active transport of glucose (left). The movement of glucose across the membrane against its concentration gradient

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